On the job's main page, Recent Changes correctly link to Bugzilla bugs. However, if we go to specific builds' Recent Changes, links are broken.
On a build's page, something like the following is shown
<a href='https://bugzilla/.../?id=1234'>Bug 1234</a> - $COMMIT_MESSAGE
which should have been like $LINK_TO_BUG1234 $COMMIT_MESSAGE
From the page's source, it looks like all leading angled brackets are missing from the beginning of the Bugzilla URL's. For example
<a href='https://bugzilla/.../?id=1234'>Bug 1234</a><br>$COMMIT_MESSAGE